Home / 3,947.72-5,921.58-1,351.40

Finding the Fourth Proportional to 3,947.72, 5,921.58 and 1,351.40

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Solution

The fourth proportional to 3,947.72, 5,921.58 and 1,351.40 is: 2,027.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.72 : 5,921.58 = 1,351.40 : x
  2. Step 2: Convert to fraction form
    3,947.72/5,921.58 = 1,351.40/x
  3. Step 3: Cross multiply
    3,947.72x = 5,921.58 × 1,351.40
  4. Step 4: Simplify right side
    3,947.72x = 8,002,423.21
  5. Step 5: Solve for x
    x = 8,002,423.21/3,947.72
  6. Step 6: Final answer
    x = 2,027.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.